When to take LH test?

[BlueberryMacaron]

I know that pregnancy tests should your first morning urine, but is the same true for LH tests as well?

This depends on which ones you're using - check the instructions. Clearblue specifically want you to use first morning urine. Others like easy@home suggest the afternoon.

I use both. Because I have such a fast rise and fall, once I see a rise I test every few hours with easy@home to track the actual peak.